In a small bowl, whisk together goat cheese, sour cream, chives, water and vinegar - season to taste with salt and pepper.

In a large skillet, heat oil over medium-high. Season chicken with salt and pepper. Place chicken into the skillet, working in batches if needed, and cook until opaque throughout, about 2 to 3 minutes per side. Remove and place on a cutting board to rest for 5 minutes. Thinly slice chicken crosswise.

Divide lettuce between four plates - evenly top with the cooked chicken, cherries and walnuts. Serve with dressing alongside.